This study is a randomized prospective trial with 6-month follow up. A non-inferiority hypothesis is tested. A new developed treatment and education programme for type 1 diabetic patients (PRIMAS) will be tested compared to an established treatment and education programme (German DTTP). Primary outcome variable is glycemic control at 6-month follow up. Secondary outcome variables are: diabetes knowledge, diabetes related distress, depressive symptoms, diabetes self-efficacy, self-care behavior, attitudes towards diabetes and insulin treatment, hypoglycemia awareness.